Arkless Electronics
Trade: Amp design and repairs.
Good enough bike if you can find a decent one. A later model than the 500, so supposedly a better bike all round.
I also had (until recently) one of Arkless' little V50 Guzzis. Light enough weight and good handling - but desperately slow for a 500 even by 70s standards. Build quality definitely wouldn't be up there with the likes of the bigger engined Tonti Guzzis.
On the old vs new debate - this might be worth a watch. The guy tends to split opinion, but I like him, and his vids are always informative:
Now't to do with me!! Never had a Guzzi and the only ones that even interest me are early lemons.